Microsofts Windows Workflow Foundation (WF) provides a framework for creating scalable applications consisting of independent program units called activities. WF 4 was a major rewrite of this technology, offering significantly higher performance and making it easier to create and execute workflow applications. WF 4.5 contains new activities, designer capabilities, and a new workflow development model (state machines). It also supports the use of C# expressions in C# workflows. This four-day Microsoft Visual Studio 2015 Training Course covers WF 4.5 and uses Visual Studio 2015, which provides a visual designer for creating workflows. Primitive and control flow activities are discussed, and the alternatives to hosting workflows are covered. Collection and parallel activities are covered. The creation of custom activities, both using the designer and code, is explained. Flowchart and state machine activities are covered. Persistence and bookmarks are discussed. Workflow Services, using Windows Communication Foundation (WCF) is covered. The Microsoft Visual Studio 2015 Training Course concludes with a discussion of debugging, error handling, transactions and compensation.